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Commit 7d25127c authored by Tim Chen's avatar Tim Chen Committed by Thomas Gleixner
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x86/topology: Define x86's arch_update_cpu_topology 



The scheduler calls arch_update_cpu_topology() to check whether the
scheduler domains have to be rebuilt.

So far x86 has no requirement for this, but the upcoming ITMT support
makes this necessary.

Request the rebuild when the x86 internal update flag is set.

Suggested-by: default avatarMorten Rasmussen <morten.rasmussen@arm.com>
Signed-off-by: default avatarTim Chen <tim.c.chen@linux.intel.com>
Cc: linux-pm@vger.kernel.org
Cc: peterz@infradead.org
Cc: jolsa@redhat.com
Cc: rjw@rjwysocki.net
Cc: linux-acpi@vger.kernel.org
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: bp@suse.de
Link: http://lkml.kernel.org/r/bfbf5591276ec60b2af2da798adc1060df1e2a5f.1479844244.git.tim.c.chen@linux.intel.com


Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent afe06efd

arch/x86/include/asm/topology.h

+1 −0
Original line number Diff line number Diff line
@@ -146,4 +146,5 @@ struct pci_bus; 
int x86_pci_root_bus_node(int bus);

void x86_pci_root_bus_resources(int bus, struct list_head *resources);



extern bool x86_topology_update;

#endif /* _ASM_X86_TOPOLOGY_H */

arch/x86/kernel/smpboot.c

+11 −0
Original line number Diff line number Diff line
@@ -109,6 +109,17 @@ static bool logical_packages_frozen __read_mostly; 
/* Maximum number of SMT threads on any online core */

int __max_smt_threads __read_mostly;



/* Flag to indicate if a complete sched domain rebuild is required */

bool x86_topology_update;



int arch_update_cpu_topology(void)

{

	int retval = x86_topology_update;



	x86_topology_update = false;

	return retval;

}



static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip)

{

	unsigned long flags;